7728697 has 2 divisors, whose sum is σ = 7728698. Its totient is φ = 7728696.

The previous prime is 7728689. The next prime is 7728701. The reversal of 7728697 is 7968277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7502121 + 226576 = 2739^2 + 476^2 .

It is a cyclic number.

It is not a de Polignac number, because 7728697 - 2³ = 7728689 is a prime.

It is not a weakly prime, because it can be changed into another prime (7728647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3864348 + 3864349.

It is an arithmetic number, because the mean of its divisors is an integer number (3864349).

Almost surely, 2^7728697 is an apocalyptic number.

It is an amenable number.

7728697 is a deficient number, since it is larger than the sum of its proper divisors (1).

7728697 is an equidigital number, since it uses as much as digits as its factorization.

7728697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 46.

The square root of 7728697 is about 2780.0534167530. The cubic root of 7728697 is about 197.7130915863.

The spelling of 7728697 in words is "seven million, seven hundred twenty-eight thousand, six hundred ninety-seven".